GNN, allow use of all featuers in Athena

The flavor tagging GNN has the ability to decorate tracks, which isn't safe to do in production jobs. As a preventative measure, we'd disabled this feature in Athena. But this was mislead: we use Athena for a lot of non-production jobs in flavor tagging. There's no reason to limit ourselves to analysis releases.

If there's an environment variable or similar that can specify that we're running (or not running) a production job, that would also be fine with me. But we shouldn't limit the functionality to specific projects.

This removes that restriction. Tagging @bdong, @ligang, @dbiswas